French investigators are probing a ground incident during which a ramp worker suffered serious injuries during a pushback operation.

The 24 July event occurred at Paris Charles de Gaulle as an Air Canada Boeing 777-300ER was preparing for a service to Toronto.

French authority BEA states that part of the towbar fractured and that, when it disconnected from the tractor, the aircraft advanced.

The bar, under tension, struck the ramp worker's legs. BEA has not disclosed the extent of injuries, but describes the event as "serious".

BEA says the aircraft involved was C-FNNQ, which Cirium's Fleets Analyzer lists as a 2013 airframe.